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A062209
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Smoothly undulating palindromic primes of the form (12*10^a(n)-21)/99.
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26
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7, 11, 43, 139, 627, 1399, 1597, 1979, 7809, 14059, 46499
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Prime versus probable prime status and proofs are given in the author's table.
No further terms < 100000. - Ray Chandler (rayjchandler(AT)sbcglobal.net), Aug 17 2011
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REFERENCES
| J.-M. De Koninck, Ces nombres qui nous fascinent, Entry 139, p. 48, Ellipses, Paris 2008.
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LINKS
| P. De Geest, SUPP Reference Table - 121
Index entries for sequences related to smoothly undulating palindromic primes
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EXAMPLE
| a(n)=11 --> (12*10^11-21)/99 = 12121212121.
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CROSSREFS
| Cf. A062210-A062232, A059758, A032758.
Sequence in context: A176955 A129865 A153377 * A086828 A117392 A105867
Adjacent sequences: A062206 A062207 A062208 * A062210 A062211 A062212
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KEYWORD
| nonn
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AUTHOR
| Patrick De Geest (pdg(AT)worldofnumbers.com) and Hans Rosenthal (Hans.Rosenthal(AT)t-online.de), Jun 15 2001.
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EXTENSIONS
| a(11)=46499 from Ray Chandler (rayjchandler(AT)sbcglobal.net), Nov 11 2010
Edited by Ray Chandler (rayjchandler(AT)sbcglobal.net), Aug 17 2011
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